//
// jq-corner.js - JQuery method for creating corner effects
//
// If this works, it was written by Dave Methvin (dave.methvin@gmail.com).
// If its broken, please fix it and send me a working copy.
//

$.fn.corner = function(o)
{
   function hex2(s) {
      var s = parseInt(s).toString(16);
      if ( s.length < 2 ) s = "0"+s;
      return s;
   }
   function gpc(node) {
      for ( ; node && node.nodeName.toLowerCase() != "html"; node = node.parentNode  ) {
         var v = $.css(node,"backgroundColor");
         if ( v.indexOf("rgb") >= 0 ) { 
            rgb = v.match(/\d+/g); 
            return "#"+ hex2(rgb[0]) + hex2(rgb[1]) + hex2(rgb[2]);
         }
         if ( v && v != "transparent" )
            return v;
      }
      return "#ffffff";
    };
   o = o || "";
   var width = parseInt((o.match(/(\d+)px/)||[])[1]) || 10;
   var fx = (o.match(/round|bevel|fold|notch/)||["round"])[0];
   var opts = {
      TL:      /top|tl/i.test(o),      TR:      /top|tr/i.test(o),
      BL:      /bottom|bl/i.test(o),   BR:      /bottom|br/i.test(o)//,
   };
   if ( !opts.TL && !opts.TR && !opts.BL && !opts.BR )
      opts = { TL:1, TR:1, BL:1, BR:1 };
   var strip = document.createElement("div");
   strip.style.overflow = "hidden";
   strip.style.height = "1px";
   strip.style.backgroundColor = "transparent";
   strip.style.borderStyle = "solid";
   return this.each(function(){
      var pad = {
         T: parseInt($.css(this,"paddingTop"))||0,
         R: parseInt($.css(this,"paddingRight"))||0,
         B: parseInt($.css(this,"paddingBottom"))||0,
         L: parseInt($.css(this,"paddingLeft"))||0
      };
      strip.style.borderColor = gpc(this.parentNode);
      if ( opts.TL || opts.TR ) {
         strip.style.borderStyle = "none "+(opts.TR?"solid":"none")+" none "+(opts.TL?"solid":"none");
         var t=document.createElement("div");
         t.style.margin = "-"+pad.T+"px -"+pad.R+"px "+(pad.T-width)+"px -"+pad.L+"px";
         t.style.backgroundColor = "transparent";
         for ( var i=0; i < width; i++ ) {
            var w = fx=="round" ? Math.round(width*(1-Math.cos(Math.asin(i/width)))) : i+1;
            var e = strip.cloneNode(false);
            e.style.borderWidth = "0 "+(opts.TR?w:0)+"px 0 "+(opts.TL?w:0)+"px";
            t.insertBefore(e, t.firstChild);
         }
         this.insertBefore(t, this.firstChild);
      }
      if ( opts.BL || opts.BR ) {
         strip.style.borderStyle = "none "+(opts.BR?"solid":"none")+" none "+(opts.BL?"solid":"none");
         var b=document.createElement("div");
         b.style.margin = (pad.B-width)+"px -"+pad.R+"px -"+pad.B+"px -"+pad.L+"px";
         b.style.backgroundColor = "transparent";
         for ( var i=0; i < width; i++ ) {
            var w = fx=="round" ? Math.round(width*(1-Math.cos(Math.asin(i/width)))) : i+1;
            var e = strip.cloneNode(false);
            e.style.borderWidth = "0 "+(opts.BR?w:0)+"px 0 "+(opts.BL?w:0)+"px";
            b.appendChild(e);
         }
         this.appendChild(b);
      }
   });
};